Enantioselective SERS sensing of pseudoephedrine in blood plasma biomatrix by hierarchical mesoporous Au films coated with a homochiral MOF

Olga Guselnikova, Hyunsoo Lim, Jongbeom Na, Miharu Eguchi, Hyun Jong Kim, Roman Elashnikov, Pavel Postnikov, Vaclav Svorcik, Oleg Semyonov, Elena Miliutina, Oleksiy Lyutakov, Yusuke Yamauchi

Research output: Contribution to journalArticlepeer-review

Abstract

Here, we present a new family of hierarchical porous hybrid materials as an innovative tool for ultrasensitive and selective sensing of enantiomeric drugs in complex biosamples via chiral surface-enhanced Raman spectroscopy (SERS). Hierarchical porous hybrid films were prepared by the combination of mesoporous plasmonic Au films and microporous homochiral metal-organic frameworks (HMOFs). The proposed hierarchical porous substrates enable extremely low limit of detection values (10−12 M) for pseudoephedrine in undiluted blood plasma due to dual enhancement mechanisms (physical enhancement by the mesoporous Au nanostructures and chemical enhancement by HMOF), chemical recognition by HMOF, and a discriminant function for bio-samples containing large biomolecules, such as blood components. We demonstrate the effect of each component (mesoporous Au and microporous AlaZnCl (HMOF)) on the analytical performance for sensing. The growth of AlaZnCl leads to an increase in the SERS signal (by around 17 times), while the use of mesoporous Au leads to an increase in the signal (by up to 40%). In the presence of a complex biomatrix (blood serum or plasma), the hybrid hierarchical porous substrate provides control over the transport of the molecules inside the pores and prevents blood protein infiltration, provoking competition with existing plasmonic materials at the limit of detection and enantioselectivity in the presence of a multicomponent biomatrix.

Original languageEnglish
Article number113109
JournalBiosensors and Bioelectronics
Volume180
DOIs
Publication statusPublished - 15 May 2021

Keywords

  • Biosensor
  • Blood plasma
  • Homochiral MOF
  • Mesoporous gold
  • Pseudoephedrine
  • SERS

ASJC Scopus subject areas

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry

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